On the home page of ArtSoft it states that " Included with Mach3 are free Wizards for such things as:"
And right below that, it says:
Also available, for a fee, are the Mach3 Addons for Mill - a handy collection of wizards designed to minimize the time it takes to go from "start to part".
Sorry, but I can't tell you why it's not working if you have the license. You might want to contact
license@machsupport.com